Gustav Adolf Lammers Heiberg

Gustav Adolf Lammers Heiberg (22 April 1875 – 1948) was a Norwegian barrister and politician for the Labour Party.

He was born in Kristiania as a son of barrister Anton Vilhelm Heiberg (1831–1885) and his wife Antonie Magdalene Fossum. He was a first cousin of Eivind, Jacob, Gunnar and Inge Heiberg and a first cousin once removed of Hans Heiberg. His sister Engel was married to physician Edvard Heiberg Hansteen.

Gustav Heiberg married twice. His first marriage, to Signe Konow, lasted from April 1904 to her death in April 1920. In 1921 he married Etty Roll, from Molde, a daughter of Ferdinand Nicolai Roll and sister of Nini Roll Anker. They settled in Vestre Aker.

Heiberg enrolled as a student in 1894 and graduated with the cand.jur. degree in 1897. He chaired Norwegian Students' Society from 1901 to 1902. After some years as a junior employee in a lawyer's office, he opened his own lawyer's office in Kristiania in 1902. From 1903 he was entitled to work with Supreme Court cases.

Heiberg was a member of the Labour Party since 1898, and served as a member of the executive committee of Kristiania city council from 1911 to 1919. Here, he was especially preoccupied with improving housing conditions in the city. He stood for parliamentary election in 1912, but was not elected. When the radical wing assumed control of the party at the 1918 national convention, he became tired from the ensuing disagreements in his party, and left politics to pursue his professional career.

In 1921 he was hired as city lawyer. He was involved in several high-profile cases, notably as a defender during the Impeachment trial of Abraham Berge in 1926 and 1927. Berge was a former Prime Minister, and his cabinet members Odd S. Klingenberg, Christian F. Michelet, Cornelius Middelthon, Johan H. Rye Holmboe, Anders Venger and Karl Wilhelm Wefring also stood for trial. They were not convicted. This has been the last impeachment trial in Norway.

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